A large dataset such as the CBC historical database requires continual proofing,
and we welcome any reports of apparent irregularities to the historic records by
contacting cbcadmin@audubon.org. To learn
the proper citation format for data viewed through the CBC database and a list of
scientific articles based on CBC data, see the CBC bibliography page. For details on the fields in the
downloaded files available here see this documentation.

Please use a current browser version to use these CBC tools. For questions, comments
or to report problems please contact cbcadmin@audubon.org.